diff --git a/src/launchpad.h b/src/launchpad.h
index b93588d..75c0cb5 100644
--- a/src/launchpad.h
+++ b/src/launchpad.h
@@ -71,7 +71,7 @@ public:
 
     std::optional<std::string> api_get(const std::string& endpoint = "", const std::map<std::string, std::string>& params = {}) const;
     std::optional<std::string> api_post(const std::string& endpoint = "",
-                                        const std::map<std::string, std::string>& params,
+                                        const std::map<std::string, std::string>& params = {},
                                         bool build_endpoint = true,
                                         const std::string& token_secret_override = "");
     std::optional<std::string> api_patch(const std::string& endpoint = "", const nlohmann::json& data);